My fridge will not operate on AC power. It only goes straight to the LP side. I have tested the thermistor and replaced the curcuit board. I have tested the outlet and the power coming into the 8amp fuse on the board. I dont know if the temperature switch has gone bad but when I check the resistance across it it reads 0.002. the heating element reads .4 for volts but I assume it's because its not being told to turn on. My fridge is a 611. Thanks for your help.